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VIII. Maintenance
Kooltronic Water-Cooled Air Conditioners require no maintenance. Air-Cooled Air Conditioners are designed to
require only the routine cleaning of air filters to assure unimpeded airflow through the condenser heat
exchanger. It is not possible to recommend specific filter cleaning intervals since the level and the nature
of airborne particulate matter differs widely with each installation. It is generally sufficient to remove and wash
the reusable aluminum mesh air filters when the outer surfaces of these filters appear covered with a thin layer
of dust or lint. Filter recoating adhesive is recommended. Appropriate disposable filters are available from
Kooltronic.
If filter service is neglected or delayed, the air conditioner will not perform at its design capacity. The first
indication of excessively clogged air filters is usually a gradual increase of temperature within the equipment
cabinet. If operation is continued under these conditions, the compressor will be shut off by the thermal
overload device. The compressor will restart when its external temperature drops below the protector
threshold setting and the compressor will continue to cycle on and off. Continued operation under these
conditions will cause damage, shorten compressor life and void the warranty.
A. Filter Removal and Service
Kooltronic Air Conditioners feature an easily removable inlet filter to facilitate necessary cleaning.
CAUTION
1) Lift the filter using the attached tab to clear the lower filter retainer.
2) After removal, the filters should be flushed under warm running water with the clean side up, driving
contaminants out the dirty side of the filter. If the accumulated dirt is oily, washing in a detergent
bath is recommended, followed by a warm water rinse as above.
3) The filters may be sprayed with
Kooltronic A-16 Filter Recoating Adhesive
to trap fine airborne
contaminants, or they may simply be dried and reinstalled as strainer type filters.
Recoating is
recommended for best results.
4) Reinstall the filter: (a) keeping the tab at the bottom, slide filter into the upper retainer, (b) press filter
against the unit and, (c) slide down into lower retainer.
Do not operate the Air Conditioner for extended periods of time with the filter removed.
The condenser coil may become clogged with dust or lint from the air entering the face.
A clogged condenser coil is not readily detected and will give the same reaction as a
clogged filter. A clean filter is the best protection.
B. Compressor
All Kooltronic compressors are approved by UL and CSA, and require no maintenance. They
are hermetically sealed and charged at the factory, and equipped with automatic-reset thermal overload
protectors.
If the compressor or the hot gas bypass valve fails, it is strongly recommended that the Air Conditioner
be returned to Kooltronic for service.
